Enhancing the storage stability of organic phosphites and phosph

Details Enhancing the storage stability of organic phosphites and phosph Enhancing the storage stability of organic phosphites and phosph

1993-09-30

1998-11-24

Ambrose, Michael G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

C07F 9141, C07F 948

Patent

active

058409548

ABSTRACT:
The invention relates to a process for stabilizing an organic phosphite or phosphonite or a mixture of organic phosphites or phosphonites against hydrolysis, which comprises adding, as the stabilizer, a compound from the class of sterically hindered amines, so that the stabilized phosphite or phosphonite contains 0.1 to 25% by weight of the amine compound (relative to the phosphite or phosphonite).
Compositions comprising organic phosphite or phosphonite and sterically hindered amines are notable for excellent hydrolytic stability and have a long shelf life even at high atmospheric humidity.
The products of the process according to the invention are very useful as stabilizers for organic material, in particular organic polymers, for example synthetic polymers, against the damaging influence of heat, oxygen and/or light.

REFERENCES:
patent: 3553298 (1971-01-01), Hodan et al.
patent: 3787537 (1974-01-01), DeMarca
patent: 4116926 (1978-09-01), York
patent: 4650894 (1987-03-01), Fisch et al.
patent: 5342978 (1994-08-01), Enlow et al.
patent: 5371263 (1994-12-01), Quotschalla et al.
Derwent Abstract C81-35799D (1981).
Chem. Absts 13916 vol. 55 (1961).

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